Miss fire

ROGUEDOG2

MEMBER

1 POST

1997 MG MGF

44,500 MILES

Driving the mgf car developed a miss fire put in new plugs still hapening what could cause this? Ive been told coil pack can play up and cause miss fire leads ok but new set on order compression seams ok could being a vvc the crank sensor playing up? Or could I have burnt out a valve? The car was doing about 70 at the time and I had just changed down to accellerate when the fault developed the car has a 52mm throttle body after market induction kit fitted and is re-mapped and star chipped for performance, some one out there help me please

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Sunday, May 26th, 2013 AT 3:16 AM

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MHPAUTOS

EXPERT

32,237 POSTS

Do the leads and coil and let me know what this does to the misfire, also check for any vacuum leaks as well.